Key features

Working with Groups - Create a local group (similar to a distribution list) so that you can use the group within your calendar to invite people to your events.

Synchronise Contacts - Sync contacts to your mobile device. Depending on the phone you're using, you might have different default sync settings. Most phones synchronize with your My Contacts group by default, but some sync with other groups as well.

Other useful links

Google App Sync for Microsoft Outlook - Video for people who want to export their Outlook contacts into Google, or who wish to work with both applications for a while, making the transition at their own pace.